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- Solar system (21174 bytes)
45: ...e parent star, perhaps orbiting it in a matter of days. It has been hypothesised that while the giant...
53: ... of life on Earth. The radiation from [[supernova|supernovae]] in spiral arms could theoretically sterilize p...
59: The first and most fundamental of these advances was the [[Nicolaus Copern...
92: ! Day<br/>(days)
191: ! Day<br/>(days) - Sun (20830 bytes)
8: ...ffc0" colspan="2" align="center" | '''Observation data'''
85: | 25.3800 [[day]]s <br>(25 d 9 h 7 min 12?8 s) [http://www.hnsky...
128: ....e. 1 light-year in ca. 1400 years, and 1 AU in 8 days.
132: ...etina]] and one's [[eyesight]].''' [[#Sun_and_eye_damage|See below for details]].
136: ...ker than its surface gravity (at the equator). Tidal effects from the planets do not significantly af... - Planetary system (2476 bytes)
5: ...to make this a viable model. Accepted theories today argue that planetary systems form from a [[solar...
7: ...companions were almost entirely evaporated by the supernova blast, leaving behind planet-sized bodies. Alter...
12: * [[Upsilon Andromedae]] - the first multiplanet extrasolar planetary s... - Planet (8450 bytes)
28: ...or rocky: Planets that are similar to [[Earth]] — with bodies largely composed of [[Rock (geolog...
43: ...factor of 2.8; S/1993 243 (1) [[Dactyl (asteroid)|Dactyl]] by a factor of 1.3; and, most remarkably, [...
48: ...]s (those outside our solar system) discovered to date have masses which are about the same or larger ...
50: ...57 plus 12|PSR B1257+12]] a burned-out star, or [[supernova]] remnant, called a [[pulsar]], comparable in siz...
56: ... solar system. No interstellar planet is known to date, but their existence is considered a plausible ... - History of science (41710 bytes)
4: ...nowledge]]. This change is considered to be so fundamental that older inquiries are known as ''pre-sci...
11: ...dge, and to de-emphasize the view that scientific data is self-evident, value-free, and context-free.
40: ... long period that followed is also known as the [[Dark Ages]]. While the [[Byzantine Empire]] still he...
43: ...[Image:Vitruvian.jpg|right|thumb|140px|[[Leonardo da Vinci]]'s [[Vitruvian Man]], an example of the bl...
46: ...vitalization of Europe. This provided a solid foundation for all future scientific work. Contact with ... - Johannes Kepler (17038 bytes)
2: ...''Johannes Kepler''' ([[December 27]], [[1571]] – [[November 15]], [[1630]]), a key figure in th...
9: ...hen Johannes was 17. His mother, an inn-keeper's daughter, had a reputation for involvement in [[witc...
21: In October [[1604]], Kepler observed the [[supernova]] which was subsequently named [[Kepler's Star]]....
33: ...on was inconsistent with that data. Using Tycho's data, Kepler was able to formulate three laws of pla...
35: ...he five intervals between the six known planets — [[Mercury (planet)|Mercury]], [[Venus (planet)... - Tycho Brahe (17516 bytes)
3: ...hemia]] (now [[Czech Republic]])) was a [[Denmark|Danish]] [[nobleman]], well known as an [[astronomer...
8: ...leman]], was an important figure in the [[Denmark|Danish]] King's court. [[Beate Bille]], Tycho's moth...
10: ...ter wrote that when he was around two, his uncle, Danish nobleman [[J? Brahe]], ''... without the know...
18: ...rrelled with Parsbjerg. A subsequent duel (in the dark) resulted in Tycho losing the bridge of his nos...
26: ...in Knudstrup Tycho fell in love with [[Kirsten J?sdatter]] who was a commoner, her father, Pastor Jorg... - Hubble Space Telescope (50930 bytes)
14: |'''Launch date'''||[[24 April]] [[1990]]
16: |'''Deorbit date'''||circa 2010
43: ...onomers achieve a better understanding of many fundamental problems in astrophysics.
54: ...opes are typically limited to resolutions of 0.5–1.0 [[arcsecond]]s, compared to a theoretical ...
58: ...OAO) mission. OAO-1's battery failed after three days, terminating the mission, but OAO-2 carried out... - Californium (7452 bytes)
1: <!-- Here is a table of data; skip past it to edit the text. -->
5: ...center">[[berkelium]] – '''californium''' – [[einsteinium]]</td>
10: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div> </table>
36: <th>[[Isotope|iso]]</th><th>[[natural abundance|NA]]</th><th>[[half-life]] </th><th>[[decay mo...
59: ...ay have been detected through [[telescope]]s in [[supernova]]e remnants. Californium-249 is formed from the ... - Iron (23778 bytes)
1: <!-- Here is a table of data; skip past it to edit the text. -->
5: ...align="center">[[manganese]] – '''iron''' – [[cobalt]]</td>
10: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div>
44: <td>[[Oxidation state]]s ([[Oxide]]) </td><td...
89: <th>[[natural abundance|NA]]</th> - Manganese (14965 bytes)
1: <!-- Here is a table of data; skip past it to edit the text. -->
5: ...n="center">[[chromium]] – '''manganese''' – [[iron]]</td>
9: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div> </table>
38: <td>[[Oxidation state]]s ([[Oxide]]) </td><td...
88: <th>[[Isotope|iso]]</th><th>[[natural abundance|NA]]</th><th>[[half-life]] </th><th>[[decay mo... - Nickel (13955 bytes)
5: ... align="center"|[[cobalt]] – '''nickel''' – [[copper]]
10: <div align="right"><small>[[Periodic table (standard)|Full table]]</small></div>
50: |[[Oxidation state]]s ([[Oxide]])
113: ! [[natural abundance|NA]]
121: |[[1 E5 s|6.077]] [[day|d]] - History of science in early cultures (11033 bytes)
9: ...r of Pythagorean triplets (3,4,5) (5,12,13). ..., dated 1900 BC, possibly millennia before Pythagoras{...
11: ...n in what is now Turkey, would use the collected data and improve [[Hipparchus]]' value for the [[pre...
16: ... of [[India]]. Their design can be conservatively dated to the [[1st millennium BC]]. Around 1800 BC, ...
38: ...g this period, while [[Hippocrates]] laid the foundations of medicine as a branch of science.
45: ...ny of the [[Constellation|constellations]] used today through the [[Almagest]]. The [[Ptolemaic system... - Star (12279 bytes)
3: ...pear as a disk instead, and to provide [[sunlight|daylight]].
9: ... diameter about 1,000 times larger than the Sun —about 1.6 [[terametre]]s. However, these have a...
11: ...known is [[Eta Carinae|η Carinae]], with 100–150 times as much mass as the Sun. Recent work ...
25: ...nside those clouds triggered by shockwaves from [[supernova]]e. High mass stars powerfully illuminate the clo...
29: ...dimmer and dimmer, fading into [[black dwarf]]s —although none exist yet. - Taurus (constellation) (2696 bytes)
1: ...nd to the southeast [[Eridanus (constellation)|Eridanus]] and [[Cetus]].
13: ...ly 4]], [[1054]], was bright enough to be seen by day. It is mentioned in Chinese history texts and Na... - Walter Baade (2275 bytes)
7: | [[944 Hidalgo]] || [[October 31]], [[1920]]
26: Along with [[Fritz Zwicky]], he proposed that [[supernova]]e could create [[neutron star]]s.
28: ...], to resolve stars in the center of the [[Andromeda galaxy]] for the first time, which led him to def...
30: ...ntified the [[Crab Nebula]] as the remnant of the supernova of the year [[1054]], and identified the optical ...
32: ...vered 10 [[asteroid]]s, including notably [[944 Hidalgo]] (long orbital period) and the [[Apollo aster...
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